Overseaming sewing-machine.



No. 679,067. Patented luly 23, |901@ A. LmEN. l ovERsEAmlNG SEWINGMAcHlNE. (Application med Aug. 1, 1900.) (No Model.) I s sheets-sneer .Zx y li l l 'lz ZL f A J 7M, s' Z] fz Z F x 6 l a fw- 5 7 m l 'lllllllllllllllll Illllllllylllllllllll Il Y J1 g f i a f l 6 y a k w* y /T/N/Essf2 mvENToR /7 xm/gi@ BY m ATTORNEY No. 679,067. Patented my 23, 190|.

A. BLmEN.

OVERSEAMING SEWING MACHINE.

(Application filed Aug. l, 1900.)

3`Sheets-Sheet 2.

(No Model.)

lllll No. 679,067. Patented July 23, 190|. A. auen. OVERSEAMING SEWINGMACHINE.

(Applictinn Bled Aug. l, 1900.) v

3 Sheets-Sheet 3.

(No Model.)

UNITED STATES PATENT OFFICE.

ALBERT BLIDEN, oE'NEw YORK', N. Y.

OVERSEAIVIING SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 679,067, dated July 23,1901.

Application led August 1, 1900. Serial No. 25,559. (No model.)

T0 aZZ whom t may concern.-

Be it known that I, ALBERT BLIDEN, a subject of the Czar of Russia, anda'resident of New York, in the county and State of New York, haveinvented certain new and useful Improvements in OverseamingSewing-Machines, of which the following is a full, clear, and exactspecification.

My invention relates particularly to that class of machines which makewhat may be called overhand stitching, and is adapted to all kinds ofwork where that character of sewing can be employed, the object being toproduce a sewing-machine of the character described which will producemore accurate and regular stitching than those heretofore in use.

Machines for overhand stitching consist, essentially, of a needle whichcarries the thread through the fabric to be sewed and a looper whichthen picks up the loop of th read that has been passed through thefabric and carries it back over said fabric into a position where itpermits the needle upon its next forward movement to pass through saidloop to form the next stitch. The looper in machines heretofore in useafter picking up the loop, as aforesaid, has followed substantially adirect course backward over the fabric, and it will be readily seen thatin so doing the loop will inevitably be allowed to become slack, and theresult is that it often fails to vopen again properly to permit theneedle to pass through the loop and a misstitch takes place.

My invention has for one of its objects the prevention of thisdifficulty, and by giving the looper after it has picked up the loop apeculiar arching movement around-the base of the loop I maintain theloop open at all times during its backward movement.

In the accompanying drawings, illustrating my invention, Figure 1 is avertical side sectional view, and Fig. 2 a top view, of the machine withthe cap removed, as indicated on lines lz s in Fig. l. Fig. 3 is a sidesectional view showing part of the means for imparting the peculiarmotion to the looper, and Fig. 4. is a front sectional view taken onlines :n :1: in Fig. 1. Figs. 5 and 6 are enlarged top and sidesectional views, respectively, showing the relative positions of theneedle and looper at different times in the operation of the machine;and Figs. 7 and 8 are respec tively side sectional and top views of theneedle and needle-carrier, hereinafter more fully described.

Similar letters of reference indicate like parts in all the drawings.

' A is the main frame, in which are provided bearings A2 for the mainshaft B, provided with hand-wheel C and pulley D. Above the main shaft Band at right angles thereto are the three shafts or rods a, l), and c,which have a limited longitudinal sliding movement in suitable bearingsin the main frame and to which are respectively secured the forks f g h,whose downward prongs engage cams 21, j, and-lc, secured to the mainshaft and by means of which the said rods a, b, and c receive theirmovement when the shaft B is rotated. Above these rods in suitablebearings in the frame is the looper-frame Z, which has a similarlongitudinal sliding movement and whose rearward L-shaped end ispivotally secured to the rod ct at m and from which it derivesitslongitudinal movement. Sidearms'nando of the looper-frame arehollowed out and form sleeves or bearings, in which the looper-bar p hasa slightly rocking movement imparted to it by means of the sleeve q,secured thereto, which vsleeve is provided with the stud r, having thehead R', adapted to engage and follow the slots in the upper end of therockframe E, the lower end of which is secured Ito the oscillating shaftF, and which rockframe engages and is operated by cam Z on the mainshaft.

A link G, having its ends pivotally connected to the arm n of thelooper-frame and the rod c, respectively, serves to give aslightlyvertical oscillation to the looper-frame around its pivot m whenthe looper and rod c perform their longitudinal movement in theoperation of the machine, the cams on the main shaft being so placed asto give a forward movement t-o thelooper-frame when the rod c is movingbackward. The forward end of the rod b is provided with a collar u, intowhich may be secured, by means of the nut lv, a needle-carrier w, and inlike manner the looper Z', having the looper-hook Z2, is secured to thelooper-bar@ by means of screwp'. The feed-disks f', secured to the shaftf2, journaled in suitable bearings in the main frame IOO - A, and g',mounted on the rock-frame g2, pivoted at gig-are held together and soclampithe material to be stitched by means of a spring g4, bearingagainst the rock-frame g2, and an adjustable nut Q6 on rod g5 in thewell-known manner. n' is a guide for the needle, secured to disk g. Thefeed-disks are operated to feed the material by any well-known means,such as the lever Z4, whose upper end Z is operated by cam Z on the mainshaft, but which is unnecessary to fully describe here, as that forms nopart of my invention.

The needle-carrier w consists of the vL- shaped piece, the upper end ofwhich is provided with a stud wg, adapted to fit in the collar u on theneedle-bar, as already described. A hole through the lower part is'provided for the insertion of the needle, (see Figs. 7 and 8,) while aiiat plate w3, secured thereto by nut w', serves to clamp the needle inplace. The needlecarrier is also provided with a hole in which isloosely fitted the tension-stud s4, having the fiat head S5, which isperiodically forced home during the operation of the machine by means ofthe flat spring 5"', secured to the rod a.

Having described the several parts of my invention, will now proceed toexplain the operation thereof, and in so doing it will be assumed thatwe are lookingat the machine from the right-hand side of Fig. 1.Themachine having been threaded by passing a thread through the tensiont', guide f2, hook 253, around the tension-stud s4, and so through theneedle, the fabric is then placed in position between the feed-diskswith the edge which is to be sewed projecting slightly. Beginning fromthe position shown in Fig. 2, as

the main shaft revolves the cam j, acting on fork g, forces theneedle-bar ZJ forward and the needle carries the thread through thefabric. At the same time rod a, and with it the looper-frame Z, togetherwith the looper-bar p and the looper Z', is also moved forward passingover the edge of the fabric as the rod c is moving backward, raising thelooperframe, &c., by means of link G. When the looper in this forwardmovement reaches a point just beyond the edge of the fabric, the cam tis forcing the rock-frame E in the direction of the arrow, Fig. 3, sothat the head R' of the stud fr, passing at this point over the rise r3in the slot s, rocks the looperbar p and swings the looper-hook to oneside and into a position to engage the loop made by the needle in itsbackward movement on continuing the rotation of the main shaft. The cam7c is so placed on said shaft that the rod c is still moving backward asthe looperframe continues this forward movement, which drops said frameand looper-bar by means of link G, so that the looper-hook isimmediately in front of and adapted to engage the opening loop oncontinuing the movement. The looper-hook is now forced through the loopby the rocking of the looper-bar p,

caused by the head R of the stud r riding down o of the rise r3 as therock-frame E now moves back in the direction opposite to that of thearrow, (see Fig. 3,) and by means of the peculiar shape of the slightrise S4 in the back portion of the slot s the peculiar arching motion ofthe looper-point is obtained, by means of which the loop is kept openand tight as the looper-hook carrying the thread is rocked to the left,and moves, substantially, in an arc around the base Z8 of the loop, as.shown in Fig. 5. The rod c at this time being moved forward and thelooperframe moving backward, the link Gr again lowers said looper-frameand looper, so that the loop is now brought into such a position thatthe needle may pass through it to form the chain-stitch. To be morespecific, the looper performs the following movements:

.a movement across the path of the needle to take up the loop, an upwardand at the same time outward and backward movement, and then a downwardand slightly-inward movement along one side of the needles path whilecarrying the loop, an outward and upward movement away from the needle,a di agonal movement across the needles path to shed the loop, and aforward and then a downward movement along the opposite side of theneedles path to the point of starting. On continuing the rotation of themain shaft the abovedescribed operation is repeated. It will be seenthat while the needle-barand carrier are retreating and in everyposition except that of their extreme outward position the thread ismerely retained by means of the usual tension Z; but when it has reachedits extreme forward position, having drawn out sufficient thread for theloop, the spring s,

bearing against the flat base of the stud .95,

prevents any looseness.

It is evident that many slight changes in mechanical details may be madewithout departing from the spirit of my invention, and I therefore donot limit myself to the specific mechanism shown.

Having now described myinvention and its mode of operation, what Iclaim, and desire to secure by Letters Patent, is-

1. In a machine of the character described the combination of a mainframe, a main shaft,a loopersuitably mounted in said frame, means forimparting a longitudinal reciprocation to said looper, a shaftmounted-in said frame, means for imparting a longitudinal reciprocationto said shaft, and means connecting said looper and shaft Wherebyaslightlyvertical motion is imparted to the looper,sub stantially asdescribed.

2. In a machine of the character described the combination of a mainframe, a main shaft, a looper-frame, a looper-bar journaled in saidlooper-frame, means for imparting a longitudinal reciprocation-to saidlooper and looper-frame, a shaft mounted in the main frame, means forimparting a longitudinal reciprocation to said shaft and means connect-IOO IIO

ing said shaft and looper-frame whereby a slightly-vertical motion isimparted to the said looper-frame, substantially as described.

3. In a machine of the character described the combination of a mainframe, a main shaft, a looper-frame, a looper-bar journaled in saidlooper-frame, means for imparting a longitudinal motion to saidlooper-bar and looper-frame, a sliding shaft journaled in the main frameprovided with a depending yoke adapted to engage a cam on the main shaftwhereby a longitudinal reciprocation is imparted to said sliding shaft,and means connecting said looper-frame and sliding shaft, whereby aslightly-vertical motion is imparted to the looper-frame, substantiallyas described.

et. In a machine of the character described the combination of a mainframe, a main shaft, a looper-frame7 a looper-bar journaled in saidlooper-frame, means for rocking said looper-bar on its axis, means forimparting a longitudinal motion to said looper-bar and looper-frame, asliding shaft journaled in the main frame provided with a depending yokeadapted to engage a cam on the main shaft whereby a longitudinalreciprocation is imparted to said sliding shaft, and means connectingsaid looper-frame and sliding shaft, whereby a slightly-vertical motionis imparted to the looper-frame, substantially as described.

5. In a machine of the character described, the combination of aneedle-carrier, a tensionstud provided with a flat head, therein, of alongitudinally-sliding rod and a spring on said rod, adapted to comeinto contact with the head of the stud, whereby said tensionstud isperiodically pressed home, substantially as described.

6. In a machine of the character described, a main frame, a main shaftjournaled therein, a slidable rod receiving reciprocation from the mainshaft, a looper-frame pivoted thereto, a second sliding rod reciprocatedby the main shaft, a connection between said second rod and thelooper-frame by which the looperframe is swung on its pivotal connectionwith the rst-named rod, a looper-bar pivoted in the looper-frame, and arock-frame operated by the main shaft and having a cam-slot engagingastud on the looper-bar, substantially as described.

'7. In a machine of the character described, a main frame, a main shaft,a looper-frame, a looper-bar journaled in said looper-frame, means forimparting a longitudinal reciprocation to said looper-bar, andlooper-frame, means connecting said looper-bar and the main shaftwhereby said looper-bar is caused 8. In a machine of the characterdescribed,

a main frame, a main shaft journaled there- 1n, a slidable rod receivingreciprocation from the main shaft, a looper-frame pivoted thereto, asecond sliding rod reciprocated by the main shaft, a connection betweensaid second rod and looper by means of which the looperframe is swung onits pivotal connection with the rst-named rod, a looper-bar journaled inthe looper-frame and means for giving said looper-bar an oscillatingmotion in its bearings, substantially as described.

9. In machines for overhand stitching the combination of a main frame, amain shaft, a reciprocating needle, a longitudinally-reciprocatingloopervframe andlooper bar, means for imparting a slightly-verticalmotion to said looper-frame and looper-bar, a rock-frame pivoted at itslower end, provided with a slot at its upper end and rocked by a cambearing against an intermediate portion, and means connecting saidrock-frame and looper-bar whereby a rocking motion is imparted to saidlooper-bar, substantially as described.

10. In machines for overhand stitching the combination of a needle,means for reciprocating the needle, a looper-frame, means for impartinga longitudinal and slightly-vertical motion to said looper-frame, alooper-bar in said looper-frame, a rock-frame pivoted at its lower end,provided with a slot in its upper end and rocked by a cam-bar againstits interior intermediate portion, and a stud secured to the looper-barand engaging the slot in the rock-frame, whereby a rocking motion iscommunicated to the looper-bar, substantially as described.

1l. In machines for overhand stitching the combination with aneedle-carrier, a tensionstud provided with a hat head therein, alongitudinally-sliding shaft, and a spring on said shaft adapted .tocome into contact with the head of the tension-stud, whereby said studis periodically pressed home, substantially as described.

In testimony whereof I have hereunto afiixed my signature in thepresence of two witnesses.

ALBERT BLIDEN. Vtnesses:

J ULIUs D. TOBIAs, M. DUNN.

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